(C#) SSH Exec (Execute Command Line)

Shows how to execute a command on an SSH server and retrieve the command output.

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// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Ssh ssh = new Chilkat.Ssh();

// Connect to an SSH server:
string hostname;
int port;

// Hostname may be an IP address or hostname:
hostname = "192.168.1.108";
port = 22;

bool success = ssh.Connect(hostname,port);
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Wait a max of 5 seconds when reading responses..
ssh.IdleTimeoutMs = 5000;

// Authenticate using login/password:
success = ssh.AuthenticatePw("myLogin","myPassword");
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Open a session channel.  (It is possible to have multiple
// session channels open simultaneously.)
int channelNum;
channelNum = ssh.OpenSessionChannel();
if (channelNum < 0) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// The SendReqExec method starts a command on the remote
// server.   The syntax of the command string depends on the
// default shell used on the remote server to run the command.
// On Windows systems it is CMD.EXE.  On UNIX/Linux
// systems the user's default shell is typically defined in /etc/password.

// Here are some examples of command lines for <b>Windows SSH servers</b>:

// Get a directory listing:
string cmd1 = "dir";

// Do a nameserver lookup:
string cmd2 = "nslookup chilkatsoft.com";

// List a specific directory.  Given that the shell is CMD.EXE, backslashes must
// be used:
string cmd3 = "dir \\temp";

// Execute a sequence of commands.  The syntax for CMD.EXE may be found
// here: http://technet.microsoft.com/en-us/library/bb490880.aspx.  Notice how the commands
// are separated by "&&" and the entire command must be enclosed in quotes:
string cmd4 = "\"cd \\temp&&dir\"";

// Here are two examples of command lines for <b>Linux/UNIX SSH servers</b>:

// Get a directory listing:
string cmd5 = "ls -l /tmp";

// Run a series of commands (syntax may depend on your default shell):
string cmd6 = "cd /etc; ls -la";

// Request a directory listing on the remote server:
// If your server is Windows, change the string from "ls" to "dir"
success = ssh.SendReqExec(channelNum,"ls");
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Call ChannelReceiveToClose to read 
// output until the server's corresponding "channel close" is received.
success = ssh.ChannelReceiveToClose(channelNum);
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Let's pickup the accumulated output of the command:
string cmdOutput = ssh.GetReceivedText(channelNum,"ansi");
if (ssh.LastMethodSuccess != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Display the remote shell's command output:
Debug.WriteLine(cmdOutput);

// Disconnect
ssh.Disconnect();